Hoang Son LTD Address: No 89/170, Ngo Gia Tu Street, Duc Giang Ward, Long Bien District, Ha Noi City Enterprise code: 0100598048 Phone: 0248273781 Representative: Nguyen Tuyet Hoa Adress: No 3, Nguyen Hong Street, Thanh Cong Ward, Ba Dinh District, Ha Noi City Duc Giang Ward, Long Bien District, Ha Noi CityFounding date: 28 - 7 - 1998